Remote access?

Hello all, i am quite new to hacking and I was wondering if and how it is possible to get remote acces / remote assistance to another persons computer. I would like to find and learn a way to view someone elses screen from my computer. I know how to attain a persons IP address but I was wondering how I go about getting access to view anothers persons screen. Is there a discreet way in which tere is no real possible way the person knows I am veiwing what they are doing. The reason i ask is due to friends acting suspicious and i think they are up to somethig, want to find out if there is a way in which they can't really know i'm viewing their screen. Please reply with any help, will be appreciated!

Get VNC viewer, its not a virus or trojan or anything, then get Cain & Abel from http://www.oxid.it steal his windows password with cain and VNC to His computer, You will be able to do what you want. Thats the discreet way...